Dr. Zhang has also been a visiting scholar at the University of Kentucky in the US. His work focuses on rock fracture mechanics and engineering, safety mining, and roadway support under complex and...view moreDr. Zhang has also been a visiting scholar at the University of Kentucky in the US. His work focuses on rock fracture mechanics and engineering, safety mining, and roadway support under complex and difficult conditions. He has presented numerous lectures on rock mechanics and engineering, mine pressure and strata control. He has lead and participated in National Natural Science Foundation of China projects, and over 40 projects with industry. He has published more than 60 papers, one book, and holds 30 patents.view less